Level 2

#### 18 words 0 ignored

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## Ignore words

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Speed

= distance travelled / time taken

Acceleration

= change in velocity / time taken

Force

= mass x acceleration

Weight

= mass x gravitational field strength

Moment

= force x perpendicular distance from pivot

Power

= current x voltage

Energy

= power x time

Current in amps

charge in coulombs / time in seconds

Voltage, V

current, I x resistance, R

Wave Speed, v

frequency, f x wavelength, lambda

Efficiency

= useful energy output from the system / total energy input to the system

Work, W

= force, F x distance, D

GPE

= mass, m x gravitational field strength, g x height, h

Power (of a system), P

= work done, W / time taken, t

Density, ρ

= mass, m / volume, V

Pressure, p

= force, F / area, A

Pressure difference, p, in Pa

= height in m x density in kg/m^3 x gravitational field strength in N/kg

Momentum

= mass x velocity